Company lists · Data refreshed September 2026

Top 25 Ot cyber solutions based in Germany

RevenueBase identified 172 ot cyber solutions headquartered in Germany as of September 2026 and tracks 2,822 professional contacts across them, including 1,056 with verified work emails. Berlin is the largest hub.

This list covers ot cyber solutions headquartered in Germany, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review
172Companies
2,822Contacts tracked
1,056Verified emails
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The 25 largest ot cyber solutions based in Germany

Ranked by team size
Top 25 of 172 ot cyber solutions based in Germany, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to ot cyber solutions: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceEssen, GermanyHQ checked Sep 21, 20261,001-5,000623 contacts →

Indirect evidence

“secunet – We are the Guardians of Europe's Digital Freedom.”

Source: RevenueBase Database · checked Sep 21, 2026
2Indirect evidenceBochum, GermanyHQ checked Sep 21, 2026501-1,000386 contacts →

Indirect evidence

“Progress is our motivation because we are convinced that it will lead us to a successful future – independent of industries, companies and social classes.”

Source: RevenueBase Database · checked Sep 21, 2026
3Indirect evidenceBonn, GermanyHQ checked Sep 21, 20261,001-5,000363 contacts →

Indirect evidence

“Wir glauben an eine sichere digitale Zukunft mit minimalen Risiken und maximalen Chancen.”

Source: RevenueBase Database · checked Sep 21, 2026
4Indirect evidenceNeu-isenburg, GermanyHQ checked Sep 21, 202651-200130 contacts →

Indirect evidence

“Die usd AG schützt Unternehmen vor Hackern und Kriminellen.”

Source: RevenueBase Database · checked Sep 21, 2026
5Indirect evidenceWuppertal, GermanyHQ checked Sep 21, 202651-20079 contacts →

Indirect evidence

“r-tec IT Security ist seit über 25 Jahren auf IT-Sicherheit spezialisiert.”

Source: RevenueBase Database · checked Sep 21, 2026
6Indirect evidenceUlm, GermanyHQ checked Sep 21, 202651-20069 contacts →

Indirect evidence

“ditis - The Security Company!”

Source: RevenueBase Database · checked Sep 21, 2026
7Indirect evidenceMendig, GermanyHQ checked Sep 21, 202651-20049 contacts →

Indirect evidence

“ProSec GmbH verwandelt Unternehmen in digitale Festungen.”

Source: RevenueBase Database · checked Sep 21, 2026
8Partial evidenceGarching, GermanyHQ checked Sep 21, 202651-20046 contacts →

Partial evidence

“HvS-Consulting AG is consulting large and medium-sized companies on the topic of cyber security since 2002.”

Source: RevenueBase Database · checked Sep 21, 2026
9Partial evidenceHamburg, GermanyHQ checked Sep 21, 202651-20040 contacts →

Partial evidence

“BDO Cyber Security GmbH is your competent partner in all in all cyber security matters.”

Source: RevenueBase Database · checked Sep 21, 2026
10Indirect evidenceLangenfeld, GermanyHQ checked Sep 21, 202611-5037 contacts →

Indirect evidence

“As an owner-managed company, admeritia GmbH turned to industrial IT security shortly after its foundation in 2004.”

Source: RevenueBase Database · checked Sep 21, 2026
11Indirect evidenceNeu-Isenburg, GermanyHQ checked Sep 21, 202651-20034 contacts →

Indirect evidence

“Wir sind die Com-Sys!”

Source: RevenueBase Database · checked Sep 21, 2026
12Indirect evidenceDüsseldorf, GermanyHQ checked Sep 21, 202611-5032 contacts →

Indirect evidence

“CLOUDYRION is a start-up for IT security consulting from Düsseldorf.”

Source: RevenueBase Database · checked Sep 21, 2026
13Indirect evidenceAugsburg, GermanyHQ checked Sep 21, 202611-5031 contacts →

Indirect evidence

“ausecus GmbH delivers IT-Security Consulting and Managed Services for critical infrastructure organisations (KRITIS).”

Source: RevenueBase Database · checked Sep 21, 2026
14Partial evidenceLeipzig, GermanyHQ checked Sep 21, 202611-5027 contacts →

Partial evidence

“Rhebo provides simple and effective cybersecurity solutions for Operational Technology and distributed industrial assets for the energy sector, critical infrastructure and…”

Source: RevenueBase Database · checked Sep 21, 2026
15Indirect evidenceBremen, GermanyHQ checked Sep 21, 202651-20026 contacts →

Indirect evidence

“Mehr Schutz vor Angriffen aus dem Cyberraum: Cyberkriminalität ist eine der größten Bedrohungen unserer Zeit.”

Source: RevenueBase Database · checked Sep 21, 2026
16Indirect evidenceMartinsried, GermanyHQ checked Sep 21, 202651-20026 contacts →

Indirect evidence

“microCAT ist ein führender Full-Service-Provider für IT-Produkte und -Dienstleistungen mit einem klaren Fokus auf IT-Security.”

Source: RevenueBase Database · checked Sep 21, 2026
17Partial evidenceLöhne, GermanyHQ checked Sep 21, 202651-20023 contacts →

Partial evidence

“digit solutions GmbH is a leading German company in the field of cybersecurity, founded in 1995.”

Source: RevenueBase Database · checked Sep 21, 2026
18Indirect evidenceKarlsruhe, GermanyHQ checked Sep 21, 202611-5022 contacts →

Indirect evidence

“Digitale Bedrohungen wachsen – und damit unsere Verantwortung.”

Source: RevenueBase Database · checked Sep 21, 2026
19Partial evidenceMunich, GermanyHQ checked Sep 21, 202611-5022 contacts →

Partial evidence

“AVIANET GmbH is a global business technology company headquartered in Munich that provides disruptive IT/OT cybersecurity services, IoT and Industrial Automation, Corporate IT…”

Source: RevenueBase Database · checked Sep 21, 2026
20Partial evidenceBerlin, GermanyHQ checked Sep 21, 202611-5020 contacts →

Partial evidence

“We turn your INdustrial CYber DEfense on, respecting your special operating systems and requirements for efficient and effective security measures, including Railways, Automotive…”

Source: RevenueBase Database · checked Sep 21, 2026
21Strong evidenceStolberg, GermanyHQ checked Sep 21, 202651-20020 contacts →

Strong evidence

“We translate challenges of digitization into secure IT/OT solutions The digital transformation of industry is leading to an increasingly complex networking of machines, systems…”

Source: RevenueBase Database · checked Sep 21, 2026
22Indirect evidenceUlm, GermanyHQ checked Sep 21, 202611-5019 contacts →

Indirect evidence

“SCHUTZWERK GmbH is an international IT security consultancy.”

Source: RevenueBase Database · checked Sep 21, 2026
23Indirect evidenceRiedwiesenstraße 1, GermanyHQ checked Sep 21, 202611-5018 contacts →

Indirect evidence

“Wir sind ein Security House.”

Source: RevenueBase Database · checked Sep 21, 2026
24Partial evidenceBerlin, GermanyHQ checked Sep 21, 202611-5017 contacts →

Partial evidence

“Die GAI NetConsult GmbH ist ein in Deutschland und dem benachbarten Ausland tätiges, unabhängiges Beratungsunternehmen für IT- und OT-Security mit Hauptsitz in Berlin.”

Source: RevenueBase Database · checked Sep 21, 2026
25Partial evidenceHallbergmoos, GermanyHQ checked Sep 21, 202611-5016 contacts →

Partial evidence

“BxC Security focuses on delivering end-to-end cyber security consulting across IT and Production environments.”

Source: RevenueBase Database · checked Sep 21, 2026

Showing 25 of 172 ot cyber solutions based in Germany

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Ot cyber solutions based in Germany at a glance

As of Sep 21, 2026
37.4%Verified-email coverage
16.4Average contacts per company
1-10Median size (employees)
11.0%Largest-city concentration · Berlin
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
91
11-50
63
51-200
13
201-500
2
501-1,000
1
1,001-5,000
2

Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 172 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among ot cyber solutions, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in Germany whose own description of what they do matches “ot cyber solutions”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names ot cyber solutions), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among ot cyber solutions, and records with no verified work email. Companies headquartered outside Germany are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every listed company carries at least one verified work email, 1,056 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 21, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names ot cyber solutions, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many ot cyber solutions are there based in Germany?

RevenueBase identified 172 ot cyber solutions headquartered in Germany as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Secunet Security Networks AG, headquartered in Essen, tops this list with the largest team on record.

Which city has the most ot cyber solutions?

Berlin leads with 19 headquartered companies, followed by Munich (7) and Frankfurt (6).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,056 verified decision-maker contacts tracked across these 172 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.